When there is no ss_rules section, the "Redir Rules" tab will have empty
form in the generated page. This is especialy the case when the
shadowsocks-libev config is from an earlier version before 3.0.6-2
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Translate the use of luci.sys.net.arptable() to luci.ip.neighbors() to allow
dropping the former function from base LuCI later on.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
